code: def tmp_dir():
      if not os.path.exists("tmp"):
          os.makedirs("tmp")
  
file_path: ecco/tests/lm_plots_test.py
imports: import pytest
  import numpy
  from ecco import lm_plots
  import os
label_desc: Use image node_id 3 for calling a global function with example usage: tmp_dir() without return types